Fermionic decays of the scalar leptoquarks S=S1(+),S1(−),Sm
and of the scalar gluons F=F1,F2 predicted by the four color symmetry
model with the Higgs mechanism of the quark-lepton mass splitting are
investigated. Widths and branching ratios of these decays are calculated and
analysed in dependence on coupling constants and on masses of the decaying
particles. It is shown that the decays S1(+)→tlj+,S1(−)→νib~,Sm→tν~j,F1→tb~,F2→tt~ are
dominant with the widths of order of a few GeV for mS,mF<1 TeV and with
the total branching ratios close to 1. In the case of mS<mt the dominant
scalar leptoquark decays are S_1^{(+)}\to cl_j^+, S_1^{(-)}\to \nu_i\tilde b,
S_m\to b\l_j^+, S_m\to c\tilde \nu_j with the total branching ratios
Br(S1(+)→cl+)≈Br(S1(−)→νb~)≈1,
Br(Sm→bl+)≈0.9 and Br(Sm→cν~)≈0.1. A
search for such decays at the LHC and Tevatron may be of interest.Comment: 11 pages, 1 figure, 1 table, to be published in Modern Physics
Letters